Starting from Goblet of Fire the HP movies started getting huge pacing problems, probably because of how much longer the corresponding books were. Half Blood Prince is excepted from that because having it be a clusterfuck would distract from how boring it was. And yeah, their hair looked insane in Goblet- though given how Harry is described in the actual books it might ironically be the closest the movies came to be accurate to that.

There's an anime/manga that takes Twilight's concept. Romance with vampires werewolves etc and actually does it quite well. It's like Twilight if it was written by someone with an actual brain and concept of how relationships should work. It's called Dance in the Vampire Bund and it's on Netflix I recommend it.